[M4IF Technotes] MediaControl node problem

[Cyril Concolato]

Hi Christian,
> > Could be, indeed. If you want to "pause" a stream, you must
> > be sure that it is *not* linked to the same OCR as the BIFS
> > scene (otherwize you would pause the scene itself!) At least
> > this could be an explanantion why the envivio content does
> > not show the same durations for the scene and for the video
> > (despite it could be the same but that makes more sense to
> > have a longuer scene duration in this case)
> The more I study the spec the more I believe that this is really the
> problem. Unfortunately I'm not so familiar with time stamps and time
> bases. I tried to use an additional OCR stream as time base for the
> video ES but without success. Maybe someone could give an example for a
> typical ObjectDescriptor with aggreated ES descriptor and especially
> SLConfigDescriptor (of course in text description) describing a scene
> with scene description stream and a video or audio media object embedded
> in this scene where the streams are not linked to the same time base.
Here is an example in text format that works fine with the Envivio
plug-ins. You can encode it with mp4tool.
BR,
Cyril
-- 
Ecole Nationale Supérieure des Télécommunications, Paris
Dept. Comelec
46, rue Barrault 75013 Paris                
Tel: +33145817991    Fax: +33145804036
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